Paper bag



(No Model.)

W. A. LORENZ.

PAPER BAG. No 342,754. Patented May 25, 1886. Fig.1 Fig.4

Wmawes: Zn-mentor:

N. PETERS. Pholo-Lilhagnpher. Washington, D c

UNITED STATES A T F1 WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUT,ASSIGNOR TO FELIX \V. LEINBACH AND CLARENCE A. \VOLLE, OF BETHLEHEM,PENNSYLVANIA.

PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 342,754, dated May 25,1886.

(No model.)

To all whom it may concern:

Be it known that I, WILLIAM A. LORENZ, of Hartford, Connecticut, haveinvented a new and useful Improvement in Paper Bags, of

which the following description and claim constitute the specification,and which is illus trated by the accompanying sheet of drawings.

This invention is an improved square-bottom paper bag.

Figure l of the drawings is a view of the seamed side of a tucked papertube suitable for a square-bottom paper bag, and having two longitudinalslits cut in the lower edge of the unseamed side thereof. The unseamedside projects somewhat below the seamed side at the lower end of thetube, and the seamed side projects correspondingly above the unseamedside at the upper end of the tube.v

Fig. 2 is aview of the lower end of the tube of Fig. 1, showing theposition of the two longitudinal slits. Fig. 3 is a perspective view ofthe tube of Figs. 1 and 2, with its lower endopened and folded, ashereinafter described. Fig. 4 is a plan view of the tube of Fig. 3,withits lower end still farther opened out into a box-like form; and Fig.5is a view of the lower wall of that box, as seen from the outside. Fig.6 is a View of the tubular blank of Figs. 4 and 5 after the box likeform has been folded down into a diamond form. Fig. 7 is a View of theblank of Fig. 6,with the top flap folded down upon the side flaps andthe bottom flap folded over upon the side flaps and the top flap,and thebag thus completed. Fig.- 5 8 is a perspective view of the bag of Fig. 7

partly opened out; and Fig. 9 is a view of the same entirely opened outinto the ordinary form of a square-bottom paper bag.

The process of folding up the bottom of this bag is as follows: Anystraight-edged implement is inserted in each tuck of the tube of Figs. 1and 2, and is pressed downward upon the lower fold of that tuck alongthe diagonal line a or b, as the case may be. Then the two 4 5 upperfolds of the tucks of the tube are lifted at the points 0 and d,respectively, and are carried toward each other on the lines of motionwhich result from their turning, as upon hinges, upon the diagonal foldse and f, respectively. At the same time the points 9 and h arerestrained from corresponding movement, but are caused to move insemicircular courses to the points i and j, respectively. Thus the twoinwardly projecting double right-angled triangular folds 7c and Z arefirst raised to the form shown in Fig. 3, and then continuously areflattened down under thetriangular spaces at and n, respectively, of theboX-like form of Fig. 4, when that form is completed by, the describedoperation. Then the 6: middle of the edges of the lower walls of thebox-like form are folded down and away from each other, turning upon thebases of those walls as upon hinges, and thus producing the diagonalfolds 0, p, q, and r, and drawing 6 down toward each other the sideflaps of the diamond form shown in Fig.6. Then paste is applied to theproper surfaces of the diamond, and the upper and lower flaps thereofare folded down,one after the other, so as to complete the paper bag ofFig. 7. This process differs from former processes of folding up thebottoms of paper bags in that the points 0 and (Z are carried towardeach otherinstead of being left at the edges of the blank when theboxlike form is made; and this bag differs from former square-bottompaper bags in that the central bend of its folds in and Z, respectively,run lengthwise of the bag instead of crosswise thereof.

The resulting improvement consists in the fact that room is provided forthe parallel passage of the two implements inserted in the tucks topositions where they can perform their functions upon other bagblankswithout the former necessity of withdrawing those implements from thefolds of the bag bottom in directions leading them away from each other,

and afterward restoring them to their former distance apart as often asa bag bottom is folded up, and also in the fact that the folds k and Zhave more elasticity and therefore greater tendency to assist in theopening out of the bag than they would have if their middle turnsextended crosswise ofthe baginstead of length 5 wise thereof. Thissuperiority of elasticity results from the fact that each of those foldsinvolves the turning three times upon itself of the upper ply of theupper fold of the adjacent tuck of the paper tubing, and the turning 10otwice upon itself of the lower ply thereof; whereas if the middle turnsof the foldsk and Z extended crosswise of the bag, each of those foldswould involve but one turning upon itself of the said upper ply, and twotnrnings upon itself of the said lower ply.

Among all the paper bags shown in prior Letters Patent of the UnitedStates the nearest approach to this of mine is that of Mark L. Deering,indicated in Reissued Letters Patent No. 10,083 of April 11, 1882. Mybag is an improvement on. that one in the respects inclicated in thelast paragraph.

I claim as my invention- A square-bottom paper bag having the in- 15weirdly-projecting double right-angled triangular folds h and Z,substantially as described in the foregoing specification, and shown inFig. 8 of the accompanying drawings.

Dated this 25th day of June, 1885.

\VIL'LIAM A. LORENZ. I

*itnesses:

ALBERT H. WALKER, WVILLARD EDDY.

